Unit 3 Estimating Word Problems

Front

What is estimating in math?

Back

Estimating is finding a number that is close enough to the right answer, often by rounding numbers.

Front

How do you round a number to the nearest hundred?

Back

Look at the tens digit: if it's 5 or more, round up; if it's 4 or less, round down.

Front

What is the purpose of using SIDES√ in word problems?

Back

SIDES√ helps to organize information and solve problems step by step.

Front

If a person has 334 baseball cards and 278 football cards, how do you estimate the total?

Back

Round 334 to 300 and 278 to 300, then add: 300 + 300 = 600.

Front

What does it mean to find the difference in distances?

Back

Finding the difference means subtracting one distance from another to see how much more or less one is.

Front

How do you estimate the total number of cans Mr. Narcisse has?

Back

Round 271 to 300 and 487 to 500, then add: 300 + 500 = 800.

Front

What is the estimated distance from Lori to her grandparents?

Back

Lori lives about 272 miles from her grandparents.

Front

How do you find out how much closer Lori is to her grandparents than her aunt?

Back

Subtract the distance to her aunt from the distance to her grandparents: 272 - 411.

Front

If Megan has hiked 312 miles and her goal is 904 miles, how do you estimate the remaining distance?

Back

Round 312 to 300 and subtract from 900: 900 - 300 = 600.

Front

What is the estimated distance from New York City to Washington, D.C.?

Back

The estimated distance is found by using the table of distances.